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I FEMZZ 1923. 11,446,541

H. H. BLACHE AUXILIARY DIESEL ENGINE COMPRESSOR Filed Aug. 20, 1920Z;/Ve ZZ}-, 7 75 6%7 71f g/gpf M Patent .l 2?, i923.

HANS EENEIK BLACHE, G1 I-ZELLEEUP NEAR (301 3331 AUXILIARY DIESEL-ENGINEApplication filed August 20, 1926. Serial No. 4-

To all 1071 cm 2'25 may concern:

it lrnown that HANS Hnnmrr BLAGIB'J, director, a subject of the King ofDenmark, residing at N 32 Sofievej, Hellerup near Copenhagen, Denmark,has invented certain new and useful improvements in AuxiliaryDiesel-Engine Compressors, of which the following is a specification.

The present invention relates to auxiliary Diesel engine compressors,and particularly to compressors of the type indicated which are designedfor installation on ships and which are utilized partly to supply air toLe cylinder or cylinders of the auxiliary ngine to atomize the fueltherein, and partly 0 supply air to the main engine.

According to the invention, each step or cvlinc er of the compressor isprovided'with a re ulating expansion chamber cont-rolled valveindividual thereto; such chambcs serving to increase the clearancespaces or chambers already provided in the respective cylinders when thevalves are open, but being cut oil from the cylinders when the val esare closed. The invention essentially ides, however, in the operatingdevices for .c cut-oil valves; and it contemplates the 'ovision of animproved connecting means whereby all of the valves may be opened andclosed simultaneously. In this way, it is.

insured that the work done by the compressor on the different stageswill always be nearly the same, whether the compressor be running atfull power or out down to a small fraction of its full power; and at thesame time any possibility of the regulating operation affecting only thelow-pressure cylinder of the compressor is avoided, which 1 matter ofconsiderable importance since nt result in the compression in the ssurecylinder reaching so high a pom that the rise in temperature might causeserious damage.

in the accompanying drawing, there is illustrated one form which theinvention may take in practice, the single figure representing avertical sectional view of such form.

Referring more particularly to the drawit indicates the high-pressure(H. P.) of the compressor, and 2' the low- (L. P) cylinder. The H. P.cylor 72/ has connected to it the expansion hamber 7c, and the L. P.cylinder is simiarly connected with the expansion chamber the passagesleading from the clearance chambers or spaces provioed the tops of therespective cylinders to said expansion chambers being controlled by tnevalves m and n. These valves may be utilized to out out communicationbetween the clearance chambers and the expansion chambers, as will beunderstood; but when open, they enable the said clearance chambers to beincreased by the expansion chambers, which latter may be made so largethat the compression action is reduced to the small fraction of its fullpower which is required when the compressor is being operated tocompress only enough air for in jecting the fuel into the cylinders ofthe auxiliary engine and does not supply any air to the main engine.

In order to prevent the regulating opera tion from affecting only thevolume of the. L. P. cylinder 5, the two valves n and m are connectedtogether for simultaneous actuation, as previously stated, so that asingle regulating action will positively open or close both valves. inthe construction illustrated in the drawing, the stems of both. valvesare pivotally connected at their upper ends to a single lever arm 0,which is fulcr'umed at one end at r and which has connected with it asuitable threaded rod a carrying a hand-wheel 7) by means of which itmay be rotated. When said wheel is turneo in the proper direction and tothe. required extent, lever 0 will be raised or lowered, as the case maybe, and in turn, will effect the desired adjustment of both valves withrelation to their respective seats.

I claim as my invention 1. A Diesel engine compressor, comprisinghighand low-pressure compression cylinders, each having clearancechamber; a piston in each cylinder; an expansion chamber connected withthe clearance chamber of each cylinder; a valve individual to eachexpansion chamber to control its communication with the clearancechamber ot the respective cylinder; and means for directly andpositively opening or closing both valves simultaneously.

2. A Diesel engine compressor, comprising highand low-pressurecompression cylinders, each having a clearance chamber; a piston in eachcylinder; an expansion chamber connected with the clearance chamber ofeach cylinder; a valve individual to each expansion chamber to controlits communi-' cation with the clearance chamber of the re spectivecylinder; and a single operating connection common to both valves fordirectly and positively opening or closing them simultaneously.

8. A Diesel engine compressor, comprising highand low-pressurecylinders; each having a clearance chamber; an expansion chamberconnected with the clearance chamber on each cylinder; a valveindividual to each expansion chamber to control its communication withthe respective cylinder; a rocking device to Which the stems of bothvalves are pivoted to be operated in unison thereby; and an actuatingmember connected to adjust said rocking device. 1

In testimony whereof he aflixes his signature. Y

HANS HENRIK BLACHE.

